diff options
| author |   mickey <mickey@openbsd.org> | 1996-10-16 11:32:05 +0000 |
|---|---|---|
| committer | mickey <mickey@openbsd.org> | 1996-10-16 11:32:05 +0000 |
| commit | e31e80fd2174241e27fcb37980fcf3af6054deec (patch) | |
| tree | e47ec61f7bee5e851418804979f4a93f2879e953 /sys/lib/libsa/memcpy.c | |
| parent | unused variable (diff) | |
| download | wireguard-openbsd-e31e80fd2174241e27fcb37980fcf3af6054deec.tar.xz wireguard-openbsd-e31e80fd2174241e27fcb37980fcf3af6054deec.zip | |
add functions.
remove functions.
optimize (:
emulate b{copy,cmp,zero} through the mem{cpy,cmp,set}.
add useful macros to stand.h
Diffstat (limited to 'sys/lib/libsa/memcpy.c')
| -rw-r--r-- | sys/lib/libsa/memcpy.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/sys/lib/libsa/memcpy.c b/sys/lib/libsa/memcpy.c index e6fed9ddbe0..3a2b2756bf8 100644 --- a/sys/lib/libsa/memcpy.c +++ b/sys/lib/libsa/memcpy.c @@ -1,4 +1,5 @@ -/* $OpenBSD: memcpy.c,v 1.2 1996/09/23 14:18:57 mickey Exp $ */ +/* $OpenBSD: memcpy.c,v 1.3 1996/10/16 11:32:07 mickey Exp $ */ +/* $NetBSD: bcopy.c,v 1.5 1995/04/22 13:46:50 cgd Exp $ */ /*- * Copyright (c) 1993 @@ -32,18 +33,31 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * from: @(#)bcopy.c 8.1 (Berkeley) 6/11/93 + * @(#)bcopy.c 8.1 (Berkeley) 6/11/93 */ #include <sys/types.h> #include "stand.h" +/* + * This is designed to be small, not fast. + */ void * memcpy(s1, s2, n) void *s1; const void *s2; size_t n; { - bcopy(s2, s1, n); + register const char *f = s2; + register char *t = s1; + + if (f < t) { + f += n; + t += n; + while (n-- > 0) + *--t = *--f; + } else + while (n-- > 0) + *t++ = *f++; return s1; } |